/**
 * 
 */
function ajaxFunction(commentsID) {
	alert("yes");
	var xmlHttp;
	try {
		// Firefox, Opera 8.0+, Safari
		xmlHttp=new XMLHttpRequest();
 	}
	catch (e) {
		// Internet Explorer
		try {
			xmlHttp=new ActiveXObject("Msxml2.XMLHTTP");
		}
		catch (e) {
			try {
				xmlHttp=new ActiveXObject("Microsoft.XMLHTTP");
			}
			catch (e) {
				alert("您的浏览器不支持AJAX！");
				return false;
			}
		}
	}
	
	xmlHttp.onreadystatechange = function() {
		if (xmlHttp.readyState == 4) {
			document.getElementById(commentsID).innerHTML = xmlHttp.responseText;
		}
	}
	xmlHttp.open("GET", "comments_ajax.php", true);
	xmlHttp.send(null);
	
 }